Thanks for the help. This problem is too hard. I think I am gonna quit, and hope that most people won't have this problem when opening a file.
I have already uninstalled adobe reader but the problem persists.

After the dialog opens I do "break all" and check the memory, everything is still ok.
Then after a tooltip is displayed, I "break all" again, and get the attached image. All question marks.
Texturebrushp points to 0x010df650. This memory belongs to my process and I never dealocated it. Strange.

Trying to become a general computer programmer these days is a bad move. Had you finished your degree 5 years earlier you would have no problem landing a programmer job even with no experience.
But now general programming it's a rat race to the bottom trying to compete with indian and chinese programmers who get paid less than $5 per hour.
I would not advise the games industry either. Although the games industry is specialized, and you won't suffer as much competition, because bellow average programmers cannot get into it,
game studios make programmers work like slaves and low pay. They assume that everyone is a geek who doesn't mind working for peanuts just because of their love of games.
Get a career on something else and develop your own indie social game on your free time.
2 specialized fields where programmers get decent pay is finance and electronics. It's not easy to break into finance. I myself am trying to get into electronics. I wish I had studied electronics or electrical engineering instead of computer science.